Hardwax oil

Introduction

Hardwax oil, sometimes spelled hard wax oil, wood finishes are typically manufactured from a mix of one or more vegetable oils and one or more waxes; the formulation may also contain a range of additional chemicals like solvents (VOCs), drying agents and pigments for color.

Hardwax oil finishes provide an aesthetically pleasing and very natural appearing finishing method without forming a “plastic” like film on the wood (which obscures the grain and texture of the wood).

Uses of Hardwax Oil

Hardwax oils may be used for beautifying and protecting wood surfaces like; wood flooring, wood millwork, wood furniture, wood countertops, wood cabinetry, wooden toys, wooden food presentation platters (when certified for food-safe use) and other wood-like substrates like cork or wood fiber panels.

Hardwax oils are formulated for both interior and exterior applications.

Application

Ease of Application

Hardwax oils are applied different than traditional wood finishing products (that get brushed or sprayed). Although the process is different, it is straightforward to complete and does not require the craftsman’s skills needed for professionally brushing or spraying a wood finish.

Most hardwax oil products call for applying the product to the surface, allowing a few minutes to saturate the wood, and thoroughly removing the remaining excess product using absorbent cloths or towels.

On wood floor applications, typically, the use of large electric floor buffers is utilized for the application process. On smaller projects, the application commonly gets performed by hand or using smaller electric tools like a random orbit sander or small buffer. Some hardwax oil products may require a roller application and leave a thin film application without wiping.

Each hardwax oil product has its recommendations for a proper application and which tools to use. It is always recommended to check the manufacturers Technical Data Sheets (TDS) for the most accurate product information.

Coats Required

Based on the technology and formulation of a product, some hardwax oils may be applied as a single coat application while others require multiple applications.

Dry and Cure Times

Dry time refers to the amount of time it takes for an applied product to dry enough before it may be carefully handled or walked on. This usually takes between 24-72 hours.

Cure time is the amount of time it takes to cure completely. This may be less than a week for two-component hardwax oil products or up to a month for single-component products.

All hardwax oil applications need to maintain favorable drying and curing conditions. Key factors include temperature, humidity, and airflow. Cool temperatures, higher relative humidity levels, and poor airflow will delay good drying and curing!

Sanding Note:

It is imperative with the use of any hardwax oil product that the sanding process is executed very well. Any sanding deficiencies can be highlighted during the application of a hardwax oil, particularly if applying a colored oil.

This does not mean that one needs to finish with very fine grit sandpaper but instead finish the sanding with a grit that leaves the wood open enough to allow the oil to penetrate evenly. Too fine of a grit selection polishes and closes the prepared wood, which means little oil will be able to enter the wood cell structure.

The more oil that can enter the wood, the better the degree of protection and longevity. When sanding is performed too fine, the amount of oil being able to enter the wood will be restricted, and the protection and durability will also be affected.

Benefits of Using a Hardwax Oil

Ability to achieve low to no sheen.
Keeps the natural look and feel of wood.
Does not build up a film over the wood.
Typically environmentally friendly.
Many color options.
Great wear-, water- and heat resistance.
Will never peel or flake.
Good stain resistance.
When properly maintained, does not require sanding and refinishing.
Will never develop White-Line Syndrome.

Care Process

DO: General cleaning using a dry duster, vacuum, water, or manufacturer recommended cleaner.

DO: Perform recommended maintenance per manufacturers recommendations.

DON’T: Damp clean until completely cured.

DON’T: Completely saturate the surface with cleaner.

DON’T: Use generic cleaning products. They can compromise the finish.

DON’T: Leave standing liquid on the surface for extended periods of time.

General Cleaning

General cleaning should be performed on an as needed basis. Dry dusting or vacuuming is enough in most cases. If needed, damp mop or damp clean an oiled surface with the recommended cleaning solution. You should never use excessive amounts of the recommended cleaning solution.

Tip: Some manufacturers include oils in their soap that will “feed” the surface. Consistent use of their soap is critical to maintaining the surface.

As with all wood floors, it is recommended to tend to spills in a timely manner.

Maintenance

One major advantage of hardwax oil finishes is that when properly maintained, they can last a lifetime without needing to be sanded and refinished.

When the surface begins to look dry or thirsty, maintenance is necessary. Maintenance typically makes the surface look freshly finished, without requiring sanding. On average, maintenance of floors or tabletops may need to happen once every 3-5 years. Maintenance frequency varies and depends on use, care and climate.

When maintained properly, hardwax oiled surfaces, will last a “lifetime,” and will look more beautiful as time goes on. Minor blemishes that may appear become part of the “patina” and add to the surfaces character, just like when one has a beautiful leather sofa, jacket, or briefcase that requires similar care.

Maintenance of hardwax oils is easier, more convenient and less time-consuming than maintaining a traditional film forming finish like polyurethane.

Repairability

Localized repairs can be performed on hardwax oil surfaces. This is significantly easier, faster, and cheaper than repairing surfaces that are finished with traditional film forming finishes, which typically require a complete re-sanding and re-finishing of the whole floor to repair minor scratches or damage satisfactorily.

Disadvantages

Comparing hardwax oil to polyurethane is like comparing apples to oranges. That being said, this is often the comparison being considered so we will take this approach.

Hardwax oil finishes do not form a film on the surface. While this is beneficial in many ways (aesthetically and allowing for repairability), it does come at a cost. The surface will be susceptible to chemicals and liquids sooner than a polyurethane floor, which has layers of plastic built up on top of the wood.

When hardwax oil wood surfaces are not appropriately maintained, it becomes more susceptible to dirt and spot retention.

Safety

As with all oil-based wood finishing products, hardwax oils are capable of spontaneous combustion.

Please dispose of oil saturated materials properly, and in accordance with local regulations.